The best real-world example that could be solved with the sum -22 + 9 is:
The temperature was -22°F yesterday. Today the temperature is 9°F. How much warmer is it today compared with yesterday?
In this scenario, you can represent the temperature on a number line, where -22 represents a temperature below zero (cold) and 9 represents a temperature above zero (warm). Adding the two values (-22 + 9) gives you the difference in temperature, which represents how much warmer it is today compared to yesterday.